I know that they had some sort of problem with spam attacks or something and weren't taking new registrations for a while.
A couple of weeks ago I did an experiment. I posted a question about IR-based wireless headphones. I put identical posts on both forums. I was expecting almost no response from the other place, as the number of participants is relatively small.
And actually the reverse happened. After two weeks, I got one response here from Scott Wurcer, (thanks, Scott!). But over there I got several responses from several people that were extremely helpful. After some back-and-forth, I learned a lot about IR data transmission, including sample schematics, PowerPoint presentations, and plain old good information. Plus nobody tried to start an argument with me or insult me. Go figure.
A couple of weeks ago I did an experiment. I posted a question about IR-based wireless headphones. I put identical posts on both forums. I was expecting almost no response from the other place, as the number of participants is relatively small.
And actually the reverse happened. After two weeks, I got one response here from Scott Wurcer, (thanks, Scott!). But over there I got several responses from several people that were extremely helpful. After some back-and-forth, I learned a lot about IR data transmission, including sample schematics, PowerPoint presentations, and plain old good information. Plus nobody tried to start an argument with me or insult me. Go figure.
Charles Hansen said:
I find most nerds laugh when you call them on it. Matters of musical taste and obsession with this or that artist are not the same as reworking physics to explain the sound of silver vs copper wires because "there is no other way". Barrie Gilbert sent me a story of sitting in a hifi shop and giving the salesman (trying to justify some $$$ interconnects) a lesson in RFI/EMI. There are virtually no equipment reviews that I have seen that have exercised due diligence in these matters.
Hi Charles,
I think it depends more on what you expect in the way of treatment from other members. It would also depend on how forthcoming someone might be with information.
For example,
When people come out with statements like this, it rubs other people the wrong way. I'm sure there are other people using the same connection point as John does in this particular example.
So what? That is earth shattering information, or an attempt to hold back information deemed a trade secret? The release of tiny bits of info, or holding them back is but a game. It will lead to requests for proof when unsubstantiated statements are made.
Sorry John, but you had simply left a comment that illustrates my point. I am not attacking you, just explaining why you feel as if you are under siege. Back to Charles ...
I have found that talking to other people one on one does more to promote harmony than anything else. If you want to talk down to people, you will receive some resentment in return. That will surely reduce the "nice" factor in any group.
Want proof? Look at how much respect Nelson Pass gets. He has his trade secrets, but he also treats others around him as intelligent people. He even answers questions. On the other hand, we also have people who enjoy making statements that never really back them up. When questioned on these statements, they typically either insult the member asking, or make a "put down" statement. A statement that is meant to evade the question asked and put the other person in a position of lesser knowledge or experience, whether that be true or not.
So, what do you dislike about the membership here? How do you normally treat other members? understand that I am not implying anything here. Just looking for the reason you are not happy.
As for members who like to challenge a well known professional, yeah. They seem to creep out from every rock sometimes. But there are ways to deal with these things, and sometimes that means you ignore them. These types of people really hate being ignored.
-Chris
Interesting comment. I've heard the same thing said both ways.
I think it depends more on what you expect in the way of treatment from other members. It would also depend on how forthcoming someone might be with information.
For example,
.
When people come out with statements like this, it rubs other people the wrong way. I'm sure there are other people using the same connection point as John does in this particular example.
So what? That is earth shattering information, or an attempt to hold back information deemed a trade secret? The release of tiny bits of info, or holding them back is but a game. It will lead to requests for proof when unsubstantiated statements are made.
Sorry John, but you had simply left a comment that illustrates my point. I am not attacking you, just explaining why you feel as if you are under siege. Back to Charles ...
I have found that talking to other people one on one does more to promote harmony than anything else. If you want to talk down to people, you will receive some resentment in return. That will surely reduce the "nice" factor in any group.
Want proof? Look at how much respect Nelson Pass gets. He has his trade secrets, but he also treats others around him as intelligent people. He even answers questions. On the other hand, we also have people who enjoy making statements that never really back them up. When questioned on these statements, they typically either insult the member asking, or make a "put down" statement. A statement that is meant to evade the question asked and put the other person in a position of lesser knowledge or experience, whether that be true or not.
So, what do you dislike about the membership here? How do you normally treat other members? understand that I am not implying anything here. Just looking for the reason you are not happy.
As for members who like to challenge a well known professional, yeah. They seem to creep out from every rock sometimes. But there are ways to deal with these things, and sometimes that means you ignore them. These types of people really hate being ignored.
-Chris
Anatech, please don't try to over analyze us. We know why Nelson is popular and we are not. It is not because of his language or approach.
Hi John,
I didn't say it was. Nelson does have better people skills though. I have no idea about Charles because I haven't seen enough of his posts to form any opinions.
I'm also not trying to analyze you at all either. I am responding to comments that Charles made that he finds us here unpleasant to deal with. That's certainly fair, but are there underlying reasons for that? I don't know. The bottom line is that maybe there is a way to make both his experiences, and yours, better in some way. It does take effort from both Charles in this case, and various other members.
Of course, it may simply be that his expectations are not being met.
Some comments I admit I did direct towards you John. You frequently take an "us and them" attitude. That defines some of the way you will be treated.
One last point I'd like to make that has to do with my quoted statement you made. Will you accept that you could lay out the schematic for all to see, and still any attempts to best the performance of your Blowtorch Pre-amplifier may never succeed? You know yourself that much of the performance comes from specific materials and component placement.
I am not attempting to have you post the thing. It's just all the "it's a secret" responses you give are pretty unnecessary I think. I'd still hope to hear one some day.
-Chris
I didn't say it was. Nelson does have better people skills though. I have no idea about Charles because I haven't seen enough of his posts to form any opinions.
I'm also not trying to analyze you at all either. I am responding to comments that Charles made that he finds us here unpleasant to deal with. That's certainly fair, but are there underlying reasons for that? I don't know. The bottom line is that maybe there is a way to make both his experiences, and yours, better in some way. It does take effort from both Charles in this case, and various other members.
Of course, it may simply be that his expectations are not being met.
Some comments I admit I did direct towards you John. You frequently take an "us and them" attitude. That defines some of the way you will be treated.
One last point I'd like to make that has to do with my quoted statement you made. Will you accept that you could lay out the schematic for all to see, and still any attempts to best the performance of your Blowtorch Pre-amplifier may never succeed? You know yourself that much of the performance comes from specific materials and component placement.
I am not attempting to have you post the thing. It's just all the "it's a secret" responses you give are pretty unnecessary I think. I'd still hope to hear one some day.
-Chris
anatech said:
Don't be coy, Chris. You act as if you've only been here a few days.
The reason it's unpleasant to post here is that the moderation sucks.
Anytime someone makes a statement or expresses an opinion that is not in line with Lipshitz, et al, the "thought police" come crashing in, hurling personal insults and making disparaging remarks:
http://www.diyaudio.com/forums/showthread.php?postid=1772320#post1772320
http://www.diyaudio.com/forums/showthread.php?postid=1772325#post1772325
http://www.diyaudio.com/forums/showthread.php?postid=1772603#post1772603
http://www.diyaudio.com/forums/showthread.php?postid=1772629#post1772629
http://www.diyaudio.com/forums/showthread.php?postid=1772658#post1772658
http://www.diyaudio.com/forums/showthread.php?postid=1772944#post1772944
http://www.diyaudio.com/forums/showthread.php?postid=1773625#post1773625
And that was all in response to just one post. If the moderators around here did their job, this place might be tolerable.
I don't find this thread unpleasant and I don't expect John C. and Charles Hansen to give out information they feel might compromise their business/jobs. Though, I feel it can make others feel like they have an "air" of superiority, sometimes. I think that's something N. Pass is really good at handling.
Personally, I just prefer people be themselves and not intentionally try to demean other members. I like to check in on this thread, off and on, and pick up bits of helpful information others are nice enough to share. And try to I share what useful info I can also.
What is this "other place" you guys keep mentioning? I missed the discussion on that I guess. Is not allowed to be talked about on this forum?
Personally, I just prefer people be themselves and not intentionally try to demean other members. I like to check in on this thread, off and on, and pick up bits of helpful information others are nice enough to share. And try to I share what useful info I can also.
What is this "other place" you guys keep mentioning? I missed the discussion on that I guess. Is not allowed to be talked about on this forum?
scott wurcer said:
Scott:
I have been obtuse on here when short on time concentration and patience as well.
I thought you were using it to bias the capsule of a condenser mike. The 20 pF (or less) of the capsule is actually much higher Z than 22 Meg at lower frequencies. While it might be fine it may well drive you crazy trying to figure out what is happening. However for a lowZ source it really doesn't matter. And where did you find a 22M carbon comp resistor today? Except for the retro MUST be better crowd the only uses for composition resistors today are very high frequencies and very high peak to average power applications. As such they have become hard to find.
I try to use practical parts whenever. Some of the unobtainum in my collection leads to unreproducible solutions. I have been repairing some function generators in my collection. They have an interesting output circuit that has full power (+/- 15V into 50 Ohms) from DC to 30 MHz. They use these interesting complementary bipolar transistors with fT in the 1 HGz range. That have become unobtainium. The generatoirs were made in the '80s the only replacement transistors I could find were from 1966 and ridiculously expensive. And no substitutes or even near parts in different packages. It would be possible to make a great line amp with them but not for production. I stick to parts I can get more of.
Here is an interesting thought- we don't directly look at the microphonics of this stuff and perhaps we should be. Its possible that a film cap would be less microphonic in an unpleasant way by the damping nature of the film. The ceramic could easily have a higher mechanical Q that would interact with the circuit and be audible. I may be way out in left field but the issue of mechanical aspects of these things has not been well explored recently, and it would explain part of the benefits of the milled from a billet box designs.
Some one mentioned glass capacitors. They have some very good qualities but fundamentally they are similar to ceramics. And very expensive for what they are. Fine for down hole applications in oilfields. Stick with NPO's for normal applications.
Charles Hansen said:
Charles,
I checked all those links and am at a loss of what it is you complain about. There is no mod intervention at all. Are you suggesting that they *should* have intervened for some reason?
Why?
Jan Didden
Something else just occured to me. If someone complains that the place they are (here) sucks and the place they are not (there) sucks not, maybe it is because they are here and not there? Or are there too many layers of abstraction in that statement??
Jan Didden
Jan Didden
1audio said:
AES Munich next month:
"P5-5 Forces in Cylindrical Metalized Film Audio Capacitors—Philip J. Duncan, University of Salford, Greater Manchester, UK; Nigel Williams, Paul S. Dodds, ICW Ltd. - Wrexham, Wales, UK
This paper is concerned with the analysis of forces acting in metalized polypropylene film capacitors in use in loudspeaker crossover circuits. Capacitors have been subjected to rapid discharge measurements to investigate mechanical resonance of the capacitor body and the electrical forces that drive the resonance. The force due to adjacent flat current sheets has been calculated in order that the magnitude of the electro-dynamic force due to the discharge current can be calculated and compared with the electrostatic force due to the potential difference between the capacitor plates. The electrostatic force is found to be dominant by several orders of magnitude, contrary to assumptions in previous work where the electro-dynamic force is assumed to be dominant. The capacitor is then modeled as a series of concentric cylindrical conductors and the distribution of forces within the body of the capacitor is considered. The primary outcome of this is that the electrostatic forces act predominantly within the inner and outer turn of the capacitor body, while all of the forces acting within the body of the capacitor are balanced almost to zero. Experimental results where resonant acoustic emissions have been measured and analyzed are presented and discussed in the context of the model proposed."
Convention Paper 7682. I'll bring a copy for you 😉
Jan Didden
It really ought not be so hard to figure, why the s/n ratio is higher here, than for instance at Diyhifi.
It's a simple matter of the number of members.
To say that the s/n ratio is bad here, compared to a forum about 1/100 the size, is pretty much like comparing a small forum to your private mailbox.
Magura 🙂
It's a simple matter of the number of members.
To say that the s/n ratio is bad here, compared to a forum about 1/100 the size, is pretty much like comparing a small forum to your private mailbox.
Magura 🙂
john curl said:
Actually, it is exactly that. However, with over a million page views of this thread, I would not exactly call you "unpopular."
Charles: We do not censor technical viewpoints. If people think what you're saying is a load of bull, they'll say so and you're right, moderators won't stop that. Works both ways- I'm constantly being called deaf and insensitive because I don't hear any of the magic stuff that only initiates can perceive and that are both earthshatteringly obvious and incapable of being heard in a blind test.
Boo freakin' hoo. Criticism hurts my widdle feewings. If they hurt yours, don't participate in open discussions.
anatech said:
This is one way to look at it.
My view is just the opposite.
John Curl has shared here his knowledge and experience to an amazing degree. I have learned a lot here.
The one thing JC don't do, as a rule, is to post schematics. I understand why and to my view it's a right attitude.
So, could it be that beauty, or ugliness, lies in the eyes of the beholder?
Could it be that JC is criticized sometimes only out of a wrong interpretation of his motives?
Not to offend any touchie feelie types, here is something technical on getting rid of erf loops.
Here is wot I'm ordering for my current 40W/ch class A amp build:
http://au.farnell.com/block/steu500-23/transformer-500va-230-400v-2-x/dp/1131586?_requestid=384277
It is an industrial E-I isolation transformer with a 230V primary and twin 115V secondaries. I use this one at the mains input, prior to the two 225VA step-down toroids (one for each channel).
The secondaries are connected in series with the centre tap connected to mains earth and the chassis.
This allows the electrical earth of each amplifier channel to be (safely) left fully floating, each channel seperately grounded back at the source via its signal lead shield.
Cheers,
Glen
Here is wot I'm ordering for my current 40W/ch class A amp build:
http://au.farnell.com/block/steu500-23/transformer-500va-230-400v-2-x/dp/1131586?_requestid=384277
It is an industrial E-I isolation transformer with a 230V primary and twin 115V secondaries. I use this one at the mains input, prior to the two 225VA step-down toroids (one for each channel).
The secondaries are connected in series with the centre tap connected to mains earth and the chassis.
This allows the electrical earth of each amplifier channel to be (safely) left fully floating, each channel seperately grounded back at the source via its signal lead shield.
Cheers,
Glen
Joshua_G said:
It does indeed depend on the point of view.
I am of the same age as John. I learned about, say, LT pair inputs, 35 years ago, at the same time John did. So, I didn't really learn from him in that respect.
I did learn here a lot from people like Syn08, Scott W, Edmond S, Andy_c, Bob C and apologies to all I forget to mention.
They also don't as a rule post complete schematics; which I wouldn't use anyway, I like to take ideas and develop them myself.
The one big difference is that Scott, Syn, Edmond, Andy_c, Bob C etc never called me a clueless, pitchfork-wielding-villager with lesser education. They never try to artificially promote conflict by talking about 'us' and 'them'. That exactly is the rub here as SY and Chris B try to explain. The reference to Nelson Pass is an apt one. You reap what you sow.
Jan Didden
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